Just to set the record straight: MapTiler is *not* the maintainer of MapLibre. MapTiler is *one of* many participating companies in the MapLibre organization, which has a board and a charter [1].
Amazon has donated $300,000 to MapLibre, Facebook - $80,000, TomTom - $10,000, and lots more companies have donated. Most of the code maintenance is done by various volunteers and companies, e.g. Amazon has hired a whole team of engineers to work on MapLibre native, etc.
P.S. I came up with the name MapLibre, called people to unite around this effort, and am on the board of the MapLibre organization. [2]
[1]: https://maplibre.org/charter/ [2]: https://twitter.com/nyuriks/status/1336493514646052864